Missing Washer in Tach Drive/Oil Pump

[lakeview]

Awl Points to the Spot
Part number 90201-08624-00, washer, plate, number 8 on the fiche is missing from my spare cover. It is available from local dealer for $4.80 but looks like it is only an M8 washer. I went to my nuts and bolts store here and the open stock stuff was too big in outside diameter to fit in the case. Are there any cheaper substitutes?
What is the effect of running without it - will the spinning rod rapidly wear out the socket in the case?
There's a long list of Yamahas up to early 2000's that use this same part, can't see why it's so pricey.

 

[Jim]

As I recall, there's no hard bush in that hole, just the aluminum, so yes... running without it will chew up the case.

 

[Jan_P]

If it was me I would put the washer you have on a bolt with a nut on each side .
clamping the washer ..put the bolt shaft in a hand held drill machine
Spin it and holding a file against it Filing down the outer diameter Till it fits

 

[Jim]

Run a Wanted ad? There's plenty of people here that delete the tach drive. Might get lucky.

 

[Grimly]

View attachment 251859
Awl Points to the Spot
Part number 90201-08624-00, washer, plate, number 8 on the fiche is missing from my spare cover. It is available from local dealer for $4.80 but looks like it is only an M8 washer. I went to my nuts and bolts store here and the open stock stuff was too big in outside diameter to fit in the case. Are there any cheaper substitutes?
What is the effect of running without it - will the spinning rod rapidly wear out the socket in the case?
There's a long list of Yamahas up to early 2000's that use this same part, can't see why it's so pricey.

Be guided by the outside diameter and pick a washer to suit. Drill a bigger hole.

 

[5twins]

Yes, that's a special washer, not a normal off-the-shelf size .....

Usually one with up to a 12mm O.D. will fit.

 

[gggGary]

Think I got a bunch of washers from china the correct size, but mailing one to Canada....

 

[bosco659]

I think I have a used one in my stash if you need it. Lmk.

 

[Wingedwheel]

Sometimes they hide out in the bottom of the hole.

 

[gggGary]

some washers on the way.
And the horse is running.

 

[lakeview]

The Baron of Baraboo to the rescue!
Thanks to all who commented.